Wire-pulling Method for Installation Flange of Full Rotation Propulsion Device

Abstract

The present invention relates to the technical field of shipbuilding, and in particular to a wire-pulling method for the installation flange of a fully rotating propulsion device, which comprises the following steps: Mark the first positioning point on the first wire-pulling member to form point O1, offset the intersection point towards the starboard direction by the set distance to obtain the second positioning point, mark the second positioning point on the third wire-pulling member to form point O3, convert point O1 to the second wire-pulling member to form point O2, and convert point O3 to the fourth wire-pulling member to form point O4; Obtain point C1 corresponding to point O1, point C2 corresponding to point O2, point C3 corresponding to point O3, and point C4 corresponding to point O4; Pull a wire between point C1 and point C2 to form the first vertical axis center line of the first installation flange, and pull a wire between point C3 and point C4 to form the second vertical axis center line of the second installation flange. The present invention can ensure that the processing result meets the requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a wire-pulling method for the mounting flange of a fully rotatable propulsion device. Background Art

[0002] During the process of shipbuilding, it is necessary to install a fully rotatable propulsion device, and the fully rotatable propulsion device is installed on the hull through a mounting flange. However, currently, the mounting flange of the installed fully rotatable propulsion device has no angle and is parallel to the horizontal plane. To ensure the correct installation of the fully rotatable propulsion device, it is necessary to ensure the machining accuracy of the plane and angle of the mounting flange, and wire-pulling is to check whether the boring allowance of the flange is sufficient and to check the machining allowance of the upper and lower planes of the flange, so as to ensure that the machining result of the mounting flange meets the requirements. Using the wire-pulling process of the mounting flange without an angle for the wire-pulling positioning of the mounting flange of the fully rotatable propulsion device with an angle will result in the machining result not meeting the requirements.

[0003] Therefore, a wire-pulling method for the mounting flange of a fully rotatable propulsion device is needed to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a wire-pulling method for the mounting flange of a fully rotatable propulsion device, which can perform wire-pulling positioning on the mounting flange of the fully rotatable propulsion device with an angle and ensure that the machining result meets the requirements.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A wire-pulling method for the mounting flange of a fully rotatable propulsion device includes the following steps:

[0007] S1. Confirm that the wire-pulling conditions are met;

[0008] S2. Confirm the center line and the baseline of the hull, as well as the bow ground sample point and the stern ground sample point of the hull;

[0009] S3. Install a first wire-pulling member, a second wire-pulling member, a third wire-pulling member, and a fourth wire-pulling member on the hull. The first wire-pulling member and the second wire-pulling member are arranged at intervals in the vertically upward direction, and the third wire-pulling member and the fourth wire-pulling member are arranged at intervals in the vertically upward direction;

[0010] S4. Offset the intersection point of the line connecting the bow ground sample point and the stern ground sample point with the center line by a set distance to the port side to obtain the first positioning point, mark the first positioning point on the first guy wire to form point O1, offset the intersection point by the set distance to the starboard side to obtain the second positioning point, mark the second positioning point on the third guy wire to form point O3, transform point O1 to the second guy wire to form point O2, and transform point O3 to the fourth guy wire to form point O4;

[0011] S5. Pull a wire between point O1 and point O2 to form the first vertical center line of the first mounting flange, and pull a wire between point O3 and point O4 to form the second vertical center line of the second mounting flange;

[0012] S6. Obtain the deflection angles of the center line of the fully rotatable propulsion device relative to the first vertical center line and the second vertical center line according to the installation angle of the fully rotatable propulsion device, so as to calculate and obtain point C1 corresponding to point O1, point C2 corresponding to point O2, point C3 corresponding to point O3, and point C4 corresponding to point O4;

[0013] S7. Pull a wire between point C1 and point C2 to form the first vertical shaft center line of the first mounting flange, and pull a wire between point C3 and point C4 to form the second vertical shaft center line of the second mounting flange;

[0014] S8. Confirm that the distance from the intersection point of the first vertical shaft center line and the first vertical center line to the baseline meets the requirements, and confirm that the distance from the intersection point of the second vertical shaft center line and the second vertical center line to the baseline meets the requirements.

[0015] Further, in step S1, the guy wire conditions include that the equipment and sections in the area below the bow deck need to be hoisted in place.

[0016] Further, in step S1, the guy wire conditions include that the hull electric welding and thermal cutting processes in the area below the bow deck are completed.

[0017] Further, in step S1, the guy wire conditions include that the airtight tests of the engine room below the bow deck and the cabins connected to the outer plate in the bow area are completed.

[0018] Further, in step S1, the guy wire conditions include that the equipment and sections in the area below the stern deck need to be hoisted in place.

[0019] Further, in step S1, the guy wire conditions include that the hull electric welding and thermal cutting processes in the area below the stern deck are completed.

[0020] Further, in step S1, the guy wire conditions include that the airtight tests of the engine room below the stern deck and the cabins connected to the outer plate in the stern area are completed.

[0021] Further, in step S4, the laser theodolite is used to transfer point O1 to the second guy wire member and transfer point O3 to the fourth guy wire member.

[0022] Further, in step S5, a first steel wire is stretched between the first guy wire member and the second guy wire member. The first steel wire passes through points O1 and O2 to mark the first vertical center line.

[0023] Further, in step S5, a second steel wire is stretched between the third guy wire member and the fourth guy wire member. The second steel wire passes through points O3 and O4 to mark the second vertical center line.

[0024] Advantages of the present invention:

[0025] For the installation flange guy wire method of a full-rotation propulsion device provided by the present invention, after confirming that the guy wire conditions are met, according to the intersection point formed by the center line of the hull and the connection line between the bow ground sample point and the stern ground sample point, a first positioning point is obtained by offsetting a set distance in the direction of the port line, and a second positioning point is obtained by offsetting a set distance in the starboard direction. The first positioning point is transferred to the first guy wire member and the second guy wire member, and the second positioning point is transferred to the third guy wire member and the fourth guy wire member. A first vertical center line of the first installation flange is obtained by stretching a wire between the first guy wire member and the second guy wire member, and a second vertical center line of the second installation flange is formed by stretching a wire between the third guy wire member and the fourth guy wire member. Then, according to the installation angle of the full-rotation propulsion device, the first vertical shaft center line and the second vertical shaft center line are obtained through calculation, and it is judged that the distance from the intersection point of the first vertical shaft center line and the first vertical center line to the baseline meets the requirements, and it is confirmed that the distance from the intersection point of the second vertical shaft center line and the second vertical center line to the baseline meets the requirements, thus completing the guy wire work of the installation flange of the full-rotation propulsion device. Through the above method, the guy wire positioning of the installation flange of the angled full-rotation propulsion device can be carried out to ensure that the processing results meet the requirements. Description of the Drawings

[0026] Figure 1 is a schematic diagram of the guy wire of the installation flange of a full-rotation propulsion device of the present invention.

[0027] In the figure:

[0028] 1. First guy wire member; 2. Second guy wire member; 3. Third guy wire member; 4. Fourth guy wire member. Detailed Embodiments

[0029] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only the parts related to the present invention are shown in the drawings, rather than all of them.

[0030] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0032] When installing a fully rotating propulsion device on a hull, the installation flange needs to be processed. During the processing, first, the central axis of the installation flange needs to be calibrated by pulling a wire. In order to be able to perform wire-pulling positioning on the installation flange of the fully rotating propulsion device with an angle and ensure that the processing result meets the requirements, as Figure 1 shown, the present invention provides a method for pulling a wire on the installation flange of a fully rotating propulsion device. The method for pulling a wire on the installation flange of a fully rotating propulsion device includes the following steps:

[0033] S1. Confirm that the wire-pulling conditions are met;

[0034] S2. Confirm the center line and the baseline of the hull, as well as the bow ground sample point and the stern ground sample point of the hull;

[0035] S3. Install a first wire-pulling member 1, a second wire-pulling member 2, a third wire-pulling member 3 and a fourth wire-pulling member 4 on the hull. The first wire-pulling member 1 and the second wire-pulling member 2 are arranged at intervals in the vertically upward direction, and the third wire-pulling member 3 and the fourth wire-pulling member 4 are arranged at intervals in the vertically upward direction;

[0036] S4. Connect the bow ground sample point and the stern ground sample point, offset the intersection of the connecting line and the center line to the port side by a set distance to obtain the first positioning point, mark the first positioning point on the first cable member 1 to form point O1, offset the intersection to the starboard side by the set distance to obtain the second positioning point, mark the second positioning point on the third cable member 3 to form point O3, transfer point O1 to the second cable member 2 to form point O2, and transfer point O3 to the fourth cable member 4 to form point O4;

[0037] S5. Stretch a cable between point O1 and point O2 to form the first vertical center line of the first mounting flange, and stretch a cable between point O3 and point O4 to form the second vertical center line of the second mounting flange;

[0038] S6. According to the installation angle of the full-rotation propulsion device, obtain the deflection angles of the center line of the full-rotation propulsion device relative to the first vertical center line and the second vertical center line, so as to calculate and obtain point C1 corresponding to point O1, point C2 corresponding to point O2, point C3 corresponding to point O3, and point C4 corresponding to point O4;

[0039] S7. Stretch a cable between point C1 and point C2 to form the first vertical shaft center line of the first mounting flange, and stretch a cable between point C3 and point C4 to form the second vertical shaft center line of the second mounting flange;

[0040] S8. Confirm that the distance from the intersection of the first vertical shaft center line and the first vertical center line to the baseline meets the requirements, and confirm that the distance from the intersection of the second vertical shaft center line and the second vertical center line to the baseline meets the requirements.

[0041] According to the above method, the first vertical shaft center line of the first mounting flange is obtained by offsetting the first vertical center line of the first mounting flange, and the second vertical shaft center line of the second mounting flange is obtained by offsetting the second vertical center line of the second mounting flange. By using the first vertical shaft center line and the second vertical shaft center line, the subsequent boring processing can be guided, which is convenient for the installation and positioning of the boring machine and ensures that the processing accuracy meets the installation of the full-rotation propulsion device.

[0042] Further, in step S1, the cable-pulling condition includes that the equipment and sections below the bow deck need to be hoisted in place. By the above method, the load can be ensured to be stable, thus ensuring the stability of the hull.

[0043] Further, in step S1, the cable-pulling condition includes that the hull electric welding and thermal forming processes in the area below the bow deck are completed. Since the electric welding and thermal forming will affect the deformation of the hull, pulling the cable after the hull electric welding and thermal forming work in the area below the bow deck is completed can ensure the stability of the hull.

[0044] Further, in step S1, the wire-pulling condition includes that the cabin below the bow deck and the cabins connected to the outer plate in the bow area have completed airtight tests. If the airtight test of the cabin is unqualified, welding operations are required. Conducting wire-pulling after the airtight test of the cabin can ensure the stability of the hull.

[0045] When installing the fully rotatable propulsion device at the stern, further, in step S1, the wire-pulling condition includes that the equipment and sections in the area below the stern deck need to be hoisted in place. By the above method, the load stability can be ensured, thereby ensuring the stability of the hull.

[0046] Further, in step S1, the wire-pulling condition includes that the hull electric welding and thermal forming processes in the area below the stern deck are completed. Since electric welding and thermal forming will affect the deformation of the hull, conducting wire-pulling after completing the hull electric welding and thermal forming work in the area below the stern deck can ensure the stability of the hull.

[0047] Further, in step S1, the wire-pulling condition includes that the cabin below the stern deck and the cabins connected to the outer plate in the stern area have completed airtight tests. If the airtight test of the cabin is unqualified, welding operations are required. Conducting wire-pulling after the airtight test of the cabin can ensure the stability of the hull.

[0048] Further, in step S4, use a laser theodolite to transfer point O1 to the second wire-pulling member 2 and transfer point O3 to the fourth wire-pulling member 4. By using a laser theodolite, it can be ensured that point O2 formed by transferring point O1 to the second wire-pulling member 2 is on the same vertical line as point O1, and point O2 formed by transferring O3 to the fourth wire-pulling member is on the same vertical line as O4.

[0049] Further, in step S5, a first steel wire is stretched between the first wire-pulling member 1 and the second wire-pulling member 2. The first steel wire passes through point O1 and point O2 to mark the first vertical center line. Specifically, in this embodiment, a steel wire with a diameter of 0.6 mm is used as the first steel wire, and a weight of 30 Kg is hung on the first steel wire to ensure that the first steel wire is in a vertical state.

[0050] Further, in step S5, a second steel wire is stretched between the third wire-pulling member 3 and the fourth wire-pulling member 4. The second steel wire passes through point O3 and point O4 to mark the second vertical center line. Specifically, in this embodiment, a steel wire with a diameter of 0.6 mm is used as the second steel wire, and a weight of 30 Kg is hung on the second steel wire to ensure the verticality of the first steel wire.

[0051] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. Alignment method of installation flange for fully rotating propulsion device, Characterized in that, It includes the following steps: S1. Confirm that the alignment conditions are met; S2. Confirm the center line of the hull and the baseline of the hull, as well as the bow ground sample point and the stern ground sample point of the hull; S3. Install a first alignment member (1), a second alignment member (2), a third alignment member (3) and a fourth alignment member (4) on the hull. The first alignment member (1) and the second alignment member (2) are arranged at intervals in the vertically upward direction, and the third alignment member (3) and the fourth alignment member (4) are arranged at intervals in the vertically upward direction; S4. Offset the intersection point of the line connecting the bow ground sample point and the stern ground sample point and the center line by a set distance to the port side to obtain a first positioning point, mark the first positioning point on the first alignment member (1) to form point O1, offset the intersection point by the set distance to the starboard side to obtain a second positioning point, mark the second positioning point on the third alignment member (3) to form point O3, transfer point O1 to the second alignment member (2) to form point O2, and transfer point O3 to the fourth alignment member (4) to form point O4; S5. Pull a line between point O1 and point O2 to form the first vertical center line of the first installation flange, and pull a line between point O3 and point O4 to form the second vertical center line of the second installation flange; S6. According to the installation angle of the fully rotating propulsion device, obtain the deflection angles of the center line of the fully rotating propulsion device relative to the first vertical center line and the second vertical center line, so as to calculate and obtain point C1 corresponding to point O1, point C2 corresponding to point O2, point C3 corresponding to point O3, and point C4 corresponding to point O4; S7. Pull a line between point C1 and point C2 to form the first vertical axis center line of the first installation flange, and pull a line between point C3 and point C4 to form the second vertical axis center line of the second installation flange; S8. Confirm that the distance from the intersection point of the first vertical axis center line and the first vertical center line to the baseline meets the requirements, and confirm that the distance from the intersection point of the second vertical axis center line and the second vertical center line to the baseline meets the requirements.

2. The alignment method of installation flange for fully rotating propulsion device according to claim 1, Characterized in that, In step S1, the alignment conditions include that the equipment and sections in the area below the bow deck need to be hoisted in place.

3. The alignment method of installation flange for fully rotating propulsion device according to claim 1, Characterized in that, In step S1, the alignment conditions include that the hull electric welding and thermal cutting processes in the area below the bow deck are completed.

4. The alignment method of installation flange for fully rotating propulsion device according to claim 1, Characterized in that, In step S1, the alignment conditions include that the airtight test of the engine room below the bow deck and the cabins connected to the outer plate in the bow area is completed.

5. The alignment method of installation flange for fully rotating propulsion device according to claim 1, Characterized in that, In step S1, the alignment conditions include that the equipment and sections in the area below the stern deck need to be hoisted in place.

6. The alignment method of installation flange for fully rotating propulsion device according to claim 1, It is characterized in that in the step S1, the wire-pulling condition includes that the hull electric welding and hot work processes in the area below the stern deck are completed.

7. The installation flange wire-pulling method for the fully rotatable propulsion device according to claim 1, It is characterized in that in the step S1, the wire-pulling condition includes that the airtight test of the engine room below the stern deck and the cabins connected to the outer plate in the stern area are completed.

8. The installation flange wire-pulling method for the fully rotatable propulsion device according to claim 1, It is characterized in that in the step S4, the O1 point is transferred to the second wire-pulling member (2) by using a laser theodolite, and the O3 point is transferred to the fourth wire-pulling member (4).

9. The installation flange wire-pulling method for the fully rotatable propulsion device according to claim 1, It is characterized in that in the step S5, a first steel wire is stretched between the first wire-pulling member (1) and the second wire-pulling member (2), and the first steel wire passes through the O1 point and the O2 point to mark the first vertical center line.

10. The installation flange wire-pulling method for the fully rotatable propulsion device according to claim 1, It is characterized in that in the step S5, a second steel wire is stretched between the third wire-pulling member (3) and the fourth wire-pulling member (4), and the second steel wire passes through the O3 point and the O4 point to mark the second vertical center line.

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